Verified answer

General formula will look like:

4

Σ 2x² + 9x + 1

n=2

sum( seq( 2x² + 9x + 1 , x , 2 , 4 , 1 ) ) =

2 & 4 are the limits......1 is the terms of the rectangle made....i assumed it to be 1.

supply the suited pattern area for each of here experiments: (a) a frequently used deck of enjoying cards incorporates fifty two enjoying cards in 4 diverse fits. There are 13 Diamonds, 13 Hearts, 13 golf equipment and 13 Spades. You randomly opt for 2 enjoying cards from a deck. the effect of activity is the suit of all the chosen enjoying cards. (b) Diamonds and Hearts are pink and golf equipment and Spades are black. think you randomly opt for 3 enjoying cards from the deck. the effect of activity is the colour of all the chosen enjoying cards. (c) A hat incorporates 3 money - one gold, one silver and one copper. you will opt for money one after the different without alternative till you pick the gold coin. the effect of activity is the sequence of money that are chosen in this technique.

Seems like "x=2" would go beneath the sigma, and "4" above, and the equation (2x...) after.